Diagnostic Procedure

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC B10A2:52 (TELEMATICS COMMUNICATION UNIT) DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	INSPECT SAS CONTROL MODULE FOR MALFUNCTION Perform the DTC inspection for the SAS control module. (See DTC INSPECTION .) Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.)] .)
1		No	Go to the next step.
2	INSPECT CAN COMMUNICATION LINE Perform an inspection in accordance with the multiplex communication system diagnostic procedure. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW (US) .) Is the CAN communication line normal?	Yes	Replace the telematics communication unit and perform the repair completion verification. (See TELEMATICS COMMUNICATION UNIT REMOVAL/INSTALLATION .)
2		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW (US) .)
Repair completion verification	VERIFY IF OTHER DTC IS DISPLAYED Perform the DTC inspection. (See DTC INSPECTION .) Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification		No	DTC troubleshooting completed.